.zfooter { 
    height: 556px;
    background: url("../img/bg_zz_btm.png") no-repeat 50% 100%;

}
.ztop {
    height: 322px;
    background: url("../img/bg_zz_top.png") no-repeat 50% 100%;

}
.content {
    background: url("../img/bg_zz_content.png") repeat-y 50% 0;

}